Wrench.



MARTIN K. OLSON, OF LOUISBURG, MINNESOTA.

WRENCH.

Specification of Letters Patent.

Patented Aug. 23, 1910.

Application filed May 3, 1910. Serial No. 559,229.

To all whom it may concern:

Be it known that I, MARTIN K. OLSON, a citizen of the United States,residing at Louisburg, in the county of Lao qui Parle and State ofMinnesota, have invented certain new and useful Improvements inTrenches, of which the following is a specification, reference being hadto the accompanying drawings.

This invention relates to improvements in wrenches of the quickadjusting type, and its object is to provide a simple, practical andefficient tool of this character which may be used as a pipe wrench, andalso as a monkey wrench.

- With the above and other objects in view, the invention consists ofthe novel construction, combination and arrangement of parts,hereinafter fully described and claimed, and illustrated in theaccompanying drawings in which:-

Figure 1 is a side elevation of my improved pipe wrench. Figs. 2 and 3are detail longitudinal sectional views. Fig. 4 is a transverse sectiontaken on the line 44 in Fig. 2. Fig. 5 is a detailperspective view ofthe retracting member, Fig. 6 is a similar view of the sleeve, and Fig.7 is a similar view of the swinging member.

Referring to the drawings 1 denotes a body or shank of a wrench whichhas at one end a suit-able handle 2 and on its intermediate portion rackteeth 3, and at its other or outer end a cross head 4 formed at one endwith an angular pipe wrench jaw 5, and at its other end with a fiat nutor bolt head engaging jaw 6.

7 denotes a slide in the form of a block mounted for movementlongitudinally of the shank l and having on its outer end at one side aremovable pipe-engaging jaw member 8, and on the other side of the sameend a fiat jaw face 9, the latter co-acting with the jaw face 6, wherebythe device may be used as a monkey wrench, while the jaws 5, 8, coact topermit of the use of the tool as a pipe wrench.

Hinged to the slide 7 on a transverse pivot pin 10 is a swinging member11 within which is journaled a cog wheel or pinion 12 adapted to meshwith the rack 3 when the swinging member 11 is in its normal position.The teeth of the pinion 12 are shaped so that they engage the rack teeth3, and also a worm 13 fixed on a shaft 14 journaled in the member 11.One end of the shaft 14 projects beyond the end of the member 11 and isprovided with a finger piece 16, whereby the worm may be turned torotate the wheel 12 and consequently shift the slide 7 longitudinally onthe shank owing to the meshing of said wheel 12 with the rack. It willbe noted that this worm gear adjustment enables very accurate adjustmentof the movable jaw or jaws of the wrench after the wheel or gear 12 isin mesh with the rack 3, and that when the member 11 is swung outwardlyto free the wheel or gear 12 from engagement with the rack, the movablejaw or jaws may be quickly moved toward or from the stationary aw or awsby shifting the slide 7. For the purpose of retaining the swingingmember 11 in its normal position, catch springs 17 are provided on itsopposite sides. These springs are secured at one end as shown at 18 andtheir free ends are adapted to engage seats 19 in'the main portion ofthe slide 7 and are formed with inclines 20 adapted to be engaged by aretracting member 21. The latter is U-shaped to straddle one side edgeof the slide 7 and is slidably mounted on said slide, as shown at 22.The two side portions or arms 23 of the retracting member 21 are formedwith inclined portions which co-act with the inclines 20 when the memberis pushed inwardly, thereby disengaging the spring catches 17 from theirkeeper seats or shoul ders 19. A coil spring 24 is arranged within theslidable retracting member 21 for the purpose of actuating it in anoutward direction and restoring it to normal position. A coil spring 25surrounds the pivot 10 of the swinging member 11 and has one of its endsbearing against said member so as to swing the latter in an outwarddirection when the releasing member 21 releases the spring catches 17.

In operation, when it is desired to quickly shift the slide 7 on theshank for the purpose of adjusting the movable jaw or jaws, the memberor part 21 is pushed inwardly so that the spring 24 will be compressedand the cam shaped arms 23 will release the catch springs 17 WVhen thisoccurs the member 11 may be swung out to the position shown in Fig. 3,to disengage the gear 12 from the rack'3, whereupon the sleeve or slide7 may be readily shifted. After the slide has been thus adjusted to thedesired position, the member 11 is swung inwardly until the catches 17engage the keeper seats 19. When this is done, the wheel 12 meshes withthe rack 3 and locks the slide 7 in adjusted position, although should amore accurate adjustment of the movable jaw or jaws be desired thefinger piece 16 is turned to rotate the worm 13 and consequently thewheel 12, which latter owing to its engagement with the rack 3 willshift the slide 7.

Having thus described the invention, what is claimed is:

1. A wrench having a shank carrying a stationary and provided with arack, a slide arranged on said shank and formin a movable jaw, a swinginmember on sai slide, a tooth wheel journa ed on said swinging member tomesh with said rack, and a worm rotatable in said swinging member and inmesh with said tooth wheel.

2. A wrench having a shank carrying a stationary jaw and rovided with arack, a slide arranged on sa1d shank and forming a movable jaw, aswinging member on said slide, a tooth wheel journaled on said swingingmember to mesh with said rack, a worm journaled in said swinging memberand in mesh with said tooth wheel, and fastening means for rigidlysecuring said swinging member to the slide.

3. A wrench having a shank carrying a stationary. jaw and provided witha rack, a slide arranged on sa1d shank and forming a movable jaw, aswinging member on said slide, a tooth wheel journaled on said swingingmember to mesh with said rack, a worm journaled in said member andmeshing with saidtooth wheel, a spring catch for retaining the swingingmember in its normal position, and a releasing member co-acting withsaid spring catch.

4. A wrench having a shank carrying a stationary jaw and provided withit rack, at slide arranged on said shank and forming a movable jaw, aswinging member on said slide, a tooth wheel 'ournaled on said swingingmember to mes with said rack, means for rotating said tooth wheel,fastening means for said swinging member, and a spring for retractingsaid swinging member when released by its fastening means.

5. A wrench having a shank carrying a stationary jaw and provided with arack, a slide arranged on sa1d shank and forming a movable jaw, aswinging member on said slide, a tooth wheel j ournaled on said swingingmember to mesh with said rack, means for rotating said tooth wheel, aspring catch for fastening said swinging member, and a releasing meansco-acting with said spring catch.

6. A wrench having a shank carrying a stationary jaw and provided with arack, a slide arranged on sa1d shank and forming a movable jaw, aswinging member on said slide, a tooth wheel journaled on said swingingmember to mesh with said rack, a spring for actuating the swingingmember to retracted position, a worm ournaled in the swinging member forrotating said wheel, spring catches carried b the swinging member,keepers on the side to receive said spring catches, and a slidablmounted spring retracted releasing mem er carried by the slide andco-acting with said spring catches.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses. MARTIN K. OLSON. Witnesses: i

A. S. PERSEN, A. D. COUNTRYMAN.

